Description from Flora of China
Lianas. Stems thick, densely gray villous. Leaves 9- or 11-foliolate; rachis 15-32 cm, including petiole 2-5 cm; leaflet blades ovate-oblong to elliptic-oblong, 5-10 × 2.5-3.5 cm, gradually decreasing in size from basal to apical pair, abaxially densely white villous, adaxially sparsely white villous, trichomes persistent on both surfaces, base broadly cuneate to rounded, apex acute to acuminate. Racemes terminal, 30-35 × 8-10 cm. Pedicel 1.5-2.5 cm, straight. Flowers 2.2-2.5 cm, fragrant. Calyx violet, both surfaces tomentose. Corolla violet; standard orbicular, glabrous. Ovary tomentose, with 5 ovules. Legume oblanceolate, 18-24 × ca. 2.5 cm, brown tomentose. Seeds ca. 3 per legume, dark brown, flat and orbicular, ca. 1.5 cm in diam. Fl. Apr-May, fr. Jul-Oct.
This species is cultivated in Anhui, Jiangsu, and Shandong.
● Thickets and trailsides on slopes. Henan, Shaanxi.